What is the meaning of aka crest?

"Aka crest" is not a commonly used phrase or term. It's possible it's a misspelling or a unique phrase within a specific context.

To understand what you mean, please provide more context:

* What is the full sentence or phrase you heard/read?

* What is the subject of the conversation/text?

* Where did you encounter this phrase?

With more information, I can help you understand the meaning of "aka crest."